What motors can this drive?

The ACS550-U1-012A-4 controls 3-phase AC induction motors from 0.5 to 7.5 kW at 400V. Ensure motor terminal rating matches the drive's output voltage and current capability.

Is filtering required?

No external DC filter is needed—the U1 model includes an integrated DC choke for EMC compliance and reduced harmonics, saving installation space and cost.

Wall mounting via DIN rail bracket (optional). The compact design (186 × 345 mm footprint) fits into tight panel layouts typical of retrofit installations.

What outputs does it provide?

Three digital inputs for control signals, one analog output (0-10V or 4-20mA selectable), and one relay output for alarms or auxiliary functions.

Can it perform soft-start or regenerative braking?

DC braking is available via optional modules. For soft-start, the ACS550 provides ramp-up control. True regenerative braking requires external hardware.

Is supply voltage critical?

The drive accepts 400V 3-phase ±10% (360-440V), making it robust for industrial sites with voltage fluctuation. 50/60 Hz auto-detection is standard.

What are the typical applications?

Ideal for pump drives, fan motors, conveyor systems, material handling, and any constant-load or variable-load 3-phase AC motor control in factories and utilities.

Yes, CE marked and fully EMC compliant per EN standards, suitable for EU installations without additional filtering in most cases.

Natural convection (no internal fan). Operating temperature is 0-50°C; external cooling is not required for standard duty cycles.

What communication options are available?

Local control via integrated keypad. Serial/fieldbus communication may require optional modules; refer to ABB documentation for expansion options.

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ACS550-U1-012A-4

ABB ACS550-U1-012A-4 Compact Frequency Converter 400V 12A 6.5kW

Category AC Drives

MSRP

$1,515.58

Unit: pcs

PN (normalized): ACS550U1012A4

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Datasheet

Specifications

power	6.5 kW
weight	3.2 kg
braking	DC braking optional
cooling	Natural convection
connector	Screw terminals
dimensions	186 × 345 × 171 mm
form_factor	Wall-mount compact
certification	CE marked, EMC compliant
input_voltage	400V 3-phase ±10%
rated_current	12A continuous
relay_outputs	1
analog_outputs	1
digital_inputs	3
output_voltage	0-400V regulated
output_frequency	0-500 Hz
protection_class	IP20
supply_frequency	50/60 Hz
internal_dc_choke	Yes
temperature_range	0-50°C operating, -20 to +60°C storage